351666644 has 24 divisors (see below), whose sum is σ = 727587840. Its totient is φ = 145516896.

The previous prime is 351666587. The next prime is 351666701. The reversal of 351666644 is 446666153.

It is an interprime number because it is at equal distance from previous prime (351666587) and next prime (351666701).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215732 + ... + 217355.

It is an arithmetic number, because the mean of its divisors is an integer number (30316160).

Almost surely, 2^351666644 is an apocalyptic number.

It is an amenable number.

351666644 is an abundant number, since it is smaller than the sum of its proper divisors (375921196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

351666644 is a wasteful number, since it uses less digits than its factorization.

351666644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433127 (or 433125 counting only the distinct ones).

The product of its digits is 311040, while the sum is 41.

The square root of 351666644 is about 18752.7769676920. The cubic root of 351666644 is about 705.8467059847.

The spelling of 351666644 in words is "three hundred fifty-one million, six hundred sixty-six thousand, six hundred forty-four".